Describe the key characteristics of each phylum of animal-like protists

Animal-like protists are commonly called protozoa (singular, protozoan). Protozoa are mostly single-celled eukaryotes. They have membrane-bound organelles and they commonly show the characteristics usually linked with animals, such as mobility and heterotrophy.

what's the

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.